Safety belt set for damping back directed impact force

Abstract

A safety belt set having backstop effect for use in a car. The safety belt set mainly includes two auto-lock sets separately connecting with two hanging members mounted on two center pillars of the car. A back-extending safety belt extends behind two front seats of the car with its two ends separately attaching to a damped fastening member of the auto-lock sets. The auto-lock set also allows a front-extending safety belt to pass therethrough so that when the car is impacted by a sudden violent back-coming force, the backward inclined front seats exert a back pull on the back-extending safety belt which causes the damped fastening member to tightly clamp the back-extending safety belt and the auto-lock sets to lock up the front-extending safety belt. Thus, the back and the front extending safety belts together secure the passenger and/or the driver to the front seats without becoming overly backward inclined and being hurt due to the broken front seat backs.

What is claimed is: 
     
       1. A safety belt set for use in a car having a front seat, a left center pillar, a right center pillar, a left front extending safety belt having one end connected to a belt winding brake device, and a right front extending safety belt having one end connected to a belt winding brake device, the safety belt set comprising: a) a hanging member for attachment to each center pillar;   b) an auto-lock set connected to each hanging member, each auto-lock set including a receiving member having a space formed therein for passing the front safety belt therethrough, a fastener member for detachable connection to the receiving member, and means carried by the fastener member for clamping the front safety belt thereto upon detachment of the fastener member from the receiving member;   c) a back safety belt for extending across the back of the front seat, the back safety belt including a pair of ends for attachment to the fastener members; and   d) whereby in the event of a back directed impact force against the car, the resulting backward inclination of the front seat against the back safety belt causes the latter to detach the fastener members from the receiving members, thereby automatically clamping the front safety belts and activating the belt winding brake devices to dampen the impact force and prevent continued backward inclination of the front seat.   
     
     
       2. The safety belt set of claim 1 wherein the back safety belt includes: a) a pair of first hanging straps;   b) a secondary hanging strap including two ends; and   c) each first hanging strap including a first end connected to a fastener and a second end connected to an end of the secondary strap.   
     
     
       3. The safety belt set of claim 1 wherein: a) the receiving member is substantially in the form of a plate and includes a transversely extending retaining slot formed at a first end of the plate, a pair of retaining walls extending upwardly from opposite sides of the plate and terminating in inwardly directed flanges, a pair of spaced stoppers at a second end of the plate, and a pair of spaced positioning blocks, with the retaining walls, positioning blocks and stoppers collectively defining the space for passing the front safety belt therethrough; and   b) the fastener member including a raised portion formed at a first end thereof, a transversely extending retaining slot formed in the raised portion, a pair of enveloping sidewalls, an end plate at a second end thereof; and a sliding plate transversely disposed between the sidewalls for sliding movement between the raised portion and the end plate.   
     
     
       4. The safety belt set of claim 1 further including a strap assembly connecting each auto-lock set to the hanging member, each strap assembly including a strap loop having two ends and a clamping means securing the two ends together. 
     
     
       5. The safety belt set of claim 4 wherein the clamping means includes an insertion pin having two separable pin legs, one pin leg including an inner face provided with an axially extending tenon, the other pin leg including an inner face provided with an axially extending mortise, and a sleeve for receiving the insertion pin therein, the sleeve having an axially extending slit formed therein.